macklind



W. R. MACKLIND Mar. 6, 1923.

FURNACE 2 sheatswnee t 1 Filed. Jan. 24, 1920 WM 2. MA cm. 1191;:

.2 Y E m N N v s V W... m A 1 0% Mar. 6,1923.

- w. R. MACKLIND FURNACE Filed Jan. 24, 1920 2 sheets-shee t 2 //vVENTOB WMBMAcIrLI/VD 'ATTNEY Patented Mar. 6, 1923.

sar s PATENT OFFICE.

WILLIAM R. MACKLIND, or CHICAGO, ILLINOIS.

, FURNACE.

Annfication filed January 24, 1920. Serial No. 353,706. I

, T 0 aZZ whom it mag concern: I

Be it known that 1, Human R. MACK- LIND, a citizen of the United States,residing at Chicago, in the county of Cook and State of illinols, haveinvented certain new" and useful improvements 1n Furnaces, of

which the following is a specification.

My invention relates to improvements infurnaces, and more particularlyto that class or type known as continuous rotary furnaces, the presentembodiment being also of the muiiie furnace type, and being particularlydesigned and adapted for treat A further and very important'object ofthe invention is the provision of an im proved rotary continuouslyoperating muffle furnace having ,an improved rotary drum or cylinderprovided with an improved axially located treating tube projecting fromthe ends thereof and having improved heat creating and discharging headsindependently supported and movable toward and from the ends of saidrotary drum'and surrounding the ends of said projecting tube, togetherwith improved means ofhermetically sealing the joints between the endsof the rotary drum and heads and between the latter and the receivingand discharging ends of the treating tube.

A. still further object is the provision of material feeding anddischarging compartments or chambers provided with improved materialfeeding and dischargingmecha nism communicating with the feed anddischarge port-ions of treating tube'independently of said rotary drumand heat creating and discharging heads and adapted when filled withmaterial and in operation to hermetically seal the opening or treatingchamber in said treating tube, this being of par .icular importance inthe treatment of luhopoue so that the latter may be kept free fromoxygen during treatment.

A still further object is the provision of a furnace wherein thematerial being treated may be subjected to any desired temperature andsuch temperature readily regulated and controlled, as well as indicatedthrough the medium of an improved pyrometer tube at the discharge end ofthe axial treating tube and provided with a yrometer recording dial.

A still further object is. the provision of improved heat insulated heatcreating and discharging heads mounted independently of the rotary drumand treating tube and divided longitudinally at their center whereby thesame may be readily taken apart for inspection, repair, or the like.

.A still further object is the provision of improved material. feedingmechanism at the ends of the material treating tube, together withinproved means of inspecting the material therein while being treated.

With the above mentioned and other ends in view, the invention consistsin the novel construction, arrangement and combination of parts,illustrated in one of its embodiments in the accompanying drawings, andparticularly pointed out in the appended claims.

, Referring to the drawings, forming w part of this specification,Figure 1, is a central longitudinal sectional view of a furnaceconstructed in accordance with this invention.

Fig. 2, a cross sectional view taken on line 2-2 of Fig. 1.

s Fig. 3, a cross sectional view taken on line 33 of Fig. 1.

Fig. 4. a cross sectional view taken on line 4-4: of Fig. 1.

Fig. 5, a top plan view of the improved furnace.

Fig. 6, an enlarged detail view of the joint between the heattransmitting elements or sections making up the improved axial treatingtube in the rotary drum.

Fig. 7. a fragmentary cross sectional view of the receiving end of thetreating tube and illustrating the manner of securing the outer heattransmitting elements to the tubular reinforcing member of the treatingtubeabove the combustion chamber of the furnace head.

Fig. 8, a fragmentary perspective View of the drum flues and battlemembers of the improved rotary drum.

Similar numerals of reference designate like parts throughout all thefigures of the drawings.

The improved furnace comprises a rotary drum or cylinder 1, made up of asurrounding shell of protecting material 1, and a plurality of heatresisting elements 1", separated by means of battle elements 1 andsupporting elements 1, forming longitudinal flues 1, and interposedpassages 1 adapted to give the heat or products of combustion a zigzagcourse, as hereinafter eX- plained.

The rotary drum or cylinder 1, is provided with an axial treating tube2, having *eiving and discharging ends extending or projecting beyondthe ends of the drum or cylinder 1.

The bailie elements 1 and fines 1, are adapted to be cleaned through themedium of clean-out openings 1", closedby means of suitable caps orcovers 1 The receiving end of the axiali treating.

vided with inner and outer heat transmitting elements 2.

The intermediate or main body portion of the tube 2, is preferably madeup of abutting tubular sections 2 said sections 2 as likewise theelements 2*, 2 and 2, being preferably formed of tire brick or othergood heat conducting; material.

:lkS a means of independently supporting and driving the rotary drum 1,and the treating tube 2, and also mounting the same in a slightlyinclined manner from theteed to the discharge end thereof, the drum orcylinder 1, is provided with circular or ring track members 3, adaptedto ride upon and be supported by pairs oiguide rollers or wheels 4, thelatter being carried by shafts 5, and the shafts 5, being supported in,bearings 5?. resting on supportsfi".

As a means of driving the rotary drum, the latter is provided with agear ring: 6. meshing with a- ;rear wheel 7, the latter being mounted onone of the shafts 5, and receiving): its motion from a second ,QQfllwheel 8. tl e gear wheel. 8. receiving: its motion .i 111 a shaft drivenfrom a suitable motor 10, i

As means of generating; and passing a ,suitablehe fluid thri l the drumor cyliniiler L about the tub. treat i her during the rota i and saiddrunr heat creating: and dischargiiroh d5 11 and 12, respectively, aremounted at the ends ot the revolving drum and independently ot' thelatter, and as a means of permitting of the ready opening and closing ofthe drum ends for inspection or. repair of the latter, as likewise forthe inspeo tion and repair of the treating tube 2, the heads 11 and 12are longitudinally movable toward and from the ends of the drum 1, bybeing independently supported, said supporting means, in the presentinstance, comprising supports 11 and 12f, respectively, slidab'le on themain support 13, which latter is also adapt-ed to support the working"parts of the drum or cylinder 1, and the feeding and discharging membersor compartments, hereinafter referred to.

The heat creating and discharging" heads 11 and 12, respectively, areprovided with openings 11 and 12 respectively, adapted to looselyreceive and contain the project ing' ends 01 the treating,- tube 2.

The heads 11 and 12, are preferably surrounded by means of heatinsulating material 11 and 12, respectively, and the latter ispreferably covered with a metallic coveringll and 12 as shown mostclearly in Fig. 2 of the drawings.

As a means of separating the heads 11 and 12, transversely, forinspection or repair of the parts, said heads are divided centrally andlongitudinally, as at lei, said parts being adapted to be detachablyheld together by means of the flange members 1 1, and any suitable andconvenient attaching elements.

The heat creating or generating head 11, is provided with a suitablecombustion 11 the products of combustion being adapted to pass upwardlyfrom such chamber 11. and through the fines 1, being diverted by thebathe elements 1, to take a somewhat Zigzag course and passing"outwardly into the discharge chamber 12, ot the heat discharging head12.

The heating fluid is adapted to pass out of the heat fine 15, and may becontrolled by means of the damper 15 As a means of hermetically sealingthe joints between the ends ot the drum or cvlin der 1, and the heads 11and 12, the latter are provided with annular seal plates 16. adapt ed toresiliently contact with and bear against annular drum seal flanges orwear plates 17.

As a means of similarly sealing the openings 11 and 12", around thereceiving: and. discharging ends o the treating tube the tubular teedextensions 2 of the trea tube 2, areprovided with si n seal plates 18,

means of conveniently 1533C: material. such for example-as iopone. toand from the feel and dischai 0 ends of the treating: tube 2 suitablematerial teedand d ischarging members or receptacles 19 and 20,respectively, are COIlUO-"tfl'tfi the extensions 2% of the treating;tube. the teedine' receptacle 19, in the present instance. forming astorage bin or chamber, the latter being supplied by means of a teedpipe 19 is provided at its end with a cap 23, and by removing the latterthe condition of the material being operated upon 111 the treating'tube2, may be observed.

As a means of discharging the material from the discharge end of thetreating tube the latter is provided with a discharging screw 24,mounted one tubularmember 24*, the latter extendingthrough thedischarginn; member or receptacle 20, and being adapted to be driven bya suitable pulley 25. The tubular member 2 1, may be opened. and closedby means of a cap 26, and'as means of determining the temperature withinthe treating tube the tubular member 24', is provided with a pyrometertube 27, having a suitable connection with a pyrometer recording dial528. The discharging recep tacle or housing 20, is provided, in thepresent instance, wlth a flue or staclr'29, pro

vided with a damper or valve 29, for the control of the gases arisingfrom the discharging; material lnto the chamber of the dischargereceptacle 20.

charged by means of a screw 31, operating on a vertical shaft 32, thelatter extending through a cone shaped quenching tank The shaft 32, isprovided with an agitator 3e, operatingin the water in the uenching tank33 in order to keep the material in a flowing condition, the water beingper1nitted to pass out through the overflow pipe and thus beingprevented from arising by means of the submerged bailie 36. As a meansof discharging the material through the discharge openings 37, the e2;-treme lower end or the shaft 32,1is provided. with a screw 38, the shaftreceivingits motion through bevel gears 39, one of the latter being;connected to a shaft 40, and beinn" driven by a pulley 41.

The top of the quenching tank 33, is pro tube and sealing the latter Asa means of hermetically sealing the the latter with vided with ventpipes 42, and the tank 33,

may be filled with water through the medium ot the inlet opening e3.

From the foregoing; description, taken in connection with theaccompanying" drawings, the operation and advantages or my inventionwill be readily understood.

ll-a r ng thus described one of the embodiments of my invention, withouthaving attempted to set forth all the forms in which itniay be made, orall the modes of its use, what 1 claim and desire to secure by LettersPatent, is, l

1. in a furnace, the combination with a rotary drum provided at its endswith annular flange members; of longitudinally diaided heat creating anddischarging heads movable transversely toward and from the ends Of"3wlddrum and provided with annular s drum, an axial heat transmittingtreating tube thereim'means for feeding material into one end of saidtreating tube, a discharge l ed at the opposite end of said treatingtube, and means within said discharge head for discharging the materialfrom said treat with the ma terial discharged. v p l in a muiil furnace,a rotary horizontal drum, an axial heat transmitting treating tubetherein, means for feeding material into s id tube, a dischargereceptacle provided a chamber at the opposite .end of s id tube, andmeans within said cham- "for discharbing the material from the drum, anaxial heat transmitting treating rtube therein, a feed mechanismdischarging the material into said treatingtube, a discharge head teedhopperprovided with provided with chamber communicating with thedischarge. end of said treating tube, and means for discharging thematerial from *1 h' lf"ltl l l' me a so arge one 0 sale 11 1e (.nc sea mthe material being: dis charged.

; to receiving and discharging ends provided wish tubular metallicreinforce ments and inner and outer heat transmit ing elements, and itsintermediate portions made a plurality of abutting tubular heattransmitti- 1 sections.

6,. In a turnac the combination with y drum provided with h insulated rodues and battles and a central treating tube;

of longitudinally divided heat creating and discharging heads includingsections movable transversely to open and close the ends of said drumprovided with annular sealing members slidablyand resiliently? a"furnace, treating tube nally split transversely movable two-part heatcreating and discharging heads surrounding the projecting ends of saidtreating tube and movable toward and from the ends of said treating tubeand rotary drum I to seal and unseal the same.

8. in a furnace, the combination with a heat insulated rotary drumprovided with an axial treating tube having its ends projecting from theends of said drum; of twopart heat creating and discharging headsincluding sections transversely movable toward and from the ends of saiddrum and surrounding the ends of said tube, the ports of said twopartheadsbeing detachably connected longitudinally for movement toward andfrom each other relative to said treating tube ends independently ofsaid movements toward and from said drum ends.

9. A furnace, comprising a rotary horizontal drum, an axial treatingtube therein and projecting from the ends thereof, a two-part headprovided with a combustion and heating chamber at one end of said tubeand drum adapted to pass the products of combustion through said drumand about said treating tube, means for feeding material into said tubeindependently of said movable head, a movable heat discharge head at theopposite end of said tube and drum, and means for discharging materialfrom the discharge end of said tube.

10. A furnace, comprising a rotary horizontally inclined drum, an axialheat transmitting treating tube therein and projecting therefrom; amovable head provided with a combustion chamber surrounding said tubeand adapted to pass the products of combustion through said drum andabout said treating tube, means for feeding material into said tube andsealing the latter with the feeding material, a discharge chamber at theopposite end of said tube and provided with a quenching chamber, andmeans for discharging material from the discharge end of said tube intosaid discharge chamber and from the latter into said quenching chamber.

11. In a muflie furnace, a rotary horizontal dunn provided with fiuesand hal des and an .l treating tube therein'and project ii tnerefrom, aninsulated head provided w, to a combustion chamber surrounding said tubeand divided into sections transversely movable to close and seal saiddrum and pass the products of combustion through said flues'and oversaid treating tube, a feed hopper provided with a mechanism dischargingmaterial into and hermetically sealing said treating tube, a secondinsulated head surrounding the opposite end of said treating tube andreceiving the products of combustion from said drum, and discharge andmuffle chambers communicating with said treating tube and sealing thelatter with the material being discharged.

12. In a muffle furnace, a rotary horizontal drum provided withlongitudinally eX- tending flues and transversely extending baffles, anaxial treating tube therein and projecting from opposite ends thereof, ahead provided with a combustion chamber surrounding said tube anddivided into sections transversely movable toward and from said drum andadapted to pass the products of combustion through said fines and aboutsaid treating tube, a feed hopper in front of said head and providedwith a feed screw discharging the material into said treatin tube, asecond head at the opposite end 0' said drum and surrounding saidtreating tube to receive the products of combustion therefrom, and a.discharge chamber communicating with the discharge end of said treatingtube and adapted to seal the latter when filled with material.

13. in a muflle furnace, a rotary horizontal drum, an axial heattransmitting treating; tube therein, a head provided with a combustionchamber surrounding said tube and adapted to pass the products ofcombustion thru said drum and about said treating tube, a feed hopper infront of said head and provided with feed mechanism discharging thematerial into said treating tube, a

discharge head provided with a chamber g with the discharge end of saidtreating tube, and means for discharging the material from the dischargeend of said tube and sealing the latter with the material beingdischarged.

14. A muffle furnace, comprising a rotary horizontal drum, an axial heattransmitting treating tube therein and projecting therefrom, a. headprovided with a combustion chamber surrounding said tube and adapted topass the products of combustion thru said drum and over said treatingtube, means for feeding material into said tube, a second headsurrounding the opposite end of said treating tube, a dischargereceptacle provided with a chamber at the opposite end of said treatingtube, and means within said chamber for discharging the material fromthedischarge end of said treatingtube and sealing the latter with thematerial being discharged.

In testimony whereof I have afiixed my signature.

WILLIAM R. MACKLIND.

communicatin

